The tutor mentions another British spelling we might seldom see, though it’s legal.

Although I’ve seen connexion, I can’t remember the last time. However, I looked it up today. Webster’s says it’s a Brit. variant of connection. Collins Essential Canadian English Dictionary & Thesaurus lists it, along with connection, as a noun form of connect.

Connexion is proper to use.

HTH:)

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.